Can somebody explain "power shifting?"
11-01-2000, 12:05 PM
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Can somebody explain "power shifting?"
As I understand it, it means shifting without using the clutch. But I don't see how this is possible...without leaving your tranny on the road in the process. I hear alot of Mustang and F-body people do this at the strip. I'm not trying to emulate, just clarify. Thanks. Oh yeah, and it benifits how?
11-01-2000, 12:11 PM
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No, it means shifting w/o lifting the throttle...
The benefits that I see are to be able to get on the power sooner after the shift and also to keep the boost up in between shifts. I was reluctant to try it at first, but it doesn't seem that bad on the car. It might wear the clutch a hair more but no worse than a hard launch.
11-01-2000, 12:13 PM
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Re: Can somebody explain "power shifting?"
Power shifting is shifting without letting off the gas, you stay in the power.
Speed shifting is shifting and "very quickly" letting off the gas and back into it.
May help a little if you're drag racing, like worth a tenth or two? Prob not worth it unless you're pretty hardcore.
You can shift without the clutch, but it's pretty tough to do it faster than powershifting in a street car. You need to double-clutch and/or rev match to get it right. I've read that some race car drivers will do clutchless shifts so they can use their other foot for braking or whatever, but they also have pretty beefy trannys in a full on race car.
Thoughts?
FB
Speed shifting is shifting and "very quickly" letting off the gas and back into it.
May help a little if you're drag racing, like worth a tenth or two? Prob not worth it unless you're pretty hardcore.
You can shift without the clutch, but it's pretty tough to do it faster than powershifting in a street car. You need to double-clutch and/or rev match to get it right. I've read that some race car drivers will do clutchless shifts so they can use their other foot for braking or whatever, but they also have pretty beefy trannys in a full on race car.
Thoughts?
FB
11-01-2000, 12:16 PM
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Even the footcams I've seen in road racing has the driver letting up briefly...
Seems like it'd be a good way to fry your clutch and maybe even the engine. I'm shifting at 6500rpm and you want me to <b>keep</b> my foot on the gas while I depress the clutch. No way! I'd be bouncing off the rev-limiter instantly, then would be slipping the clutch while/when I let it out. I just don't get it.
11-01-2000, 12:57 PM
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Almost right
Speed shifting - shifting without lifting throttle and fully disengage clutch.
Power shifting - shifting without lifting throttle and partly disengage clutch.
IMHO speed shifting is not that hard on the car but power shifting puts a lot of wear and tear on the synchros.
Power shifting - shifting without lifting throttle and partly disengage clutch.
IMHO speed shifting is not that hard on the car but power shifting puts a lot of wear and tear on the synchros.
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11-02-2000, 04:27 AM
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If you're chipped, the rev limiter is rasied to 7100, and you're supposed to shift way ealier
to maximize acceleration. If you shift quick enough you'll never touch the rev limitor or even get into the red zone. I agree it adds wear and tear on the drivetrain but it won't be any worse than a hard launch. Occationally doning this for a drag run should be fine.
